Electro-Voice Cobreflex IIB Folded Sectoral Horn

The Cobreflex IIB is an exponentially flared, reflex design engineered for public address, paging, and voice warning systems. This reflex construction delivers an exceptionally compact footprint without sacrificing high efficiency, especially when paired with appropriate compression drivers. The folded horn architecture is a hallmark of Electro-Voice engineering, combining a proven acoustic path with durable construction to meet the demanding needs of large spaces such as stadiums, airports, schools, and industrial facilities. Designed to optimize intelligibility and coverage, the Cobreflex IIB provides clear, even voice reproduction across wide areas, ensuring messages cut through ambient noise reliably and consistently.

• Compact, efficient design for versatile deployments: The exponential flare and folded geometry reduce enclosure size while preserving broad, intelligible coverage. This makes the Cobreflex IIB suitable for ceiling recess, wall-mount, podium installations, or integration into compact PA enclosures where space is at a premium.
• Patented folded horn construction (patent # 2,751,996): The unique folded pathway minimizes internal reflections and diffraction, delivering precise phase alignment and reduced distortion. This patented approach yields smooth high- and mid-frequency response, enabling natural voice projection and higher perceived clarity in noisy environments.
• Designed for high efficiency with compression drivers: Optimized to work with high-quality compression drivers, the Cobreflex IIB maximizes acoustic output per watt. The result is strong intelligibility for announcements, paging, and emergency communications, even in large auditoria or industrial spaces where loudness must be controlled and legible from a distance.
• Ideal for public address, paging, and voice warning systems: Whether used in schools, transit hubs, arenas, or factories, this horn delivers consistent coverage and speech clarity. It supports clear directional announcements and rapid dissemination of safety information, helping to improve response times in critical situations.
• Rugged, adaptable mounting and integration options: Built to withstand demanding environments, the Cobreflex IIB can be mounted in multiple configurations—ceiling, wall, or cabinet installations—with flexible hardware choices to align with existing public address systems and architectural requirements.

Technical Details of Electro-Voice Cobreflex IIB Folded Sectoral Horn

• Design and purpose: Folded sectoral horn with exponential flare tailored for high speech intelligibility and controlled horizontal dispersion in public address and voice warning applications.
• Patent and heritage: Incorporates Electro-Voice’s patented folded horn architecture (patent # 2,751,996) to optimize energy transfer and reduce phase anomalies across the operating range.
• Compatibility: Engineered to be driven by common public address amplification chains and compatible with a range of compression drivers to achieve the desired loudness and clarity.
• Coverage characteristics: Sectoral horn design provides focused horizontal dispersion and predictable vertical response, helping to maintain consistent volume and intelligibility across seating areas or workspaces.
• Construction notes: Built for reliable performance in professional environments, with mounting versatility and robust mechanical design suitable for long-term installation in both interior and demanding settings.

How to Install Electro-Voice Cobreflex IIB Folded Sectoral Horn

• Plan your deployment by assessing room size, seating layout, and the required coverage zone. Identify mounting points that provide the most even distribution of sound while avoiding acoustic obstructions.
• Choose appropriate hardware and mounting method (ceiling, wall, or cabinet integration) based on the installation environment and available space. Ensure support structures meet safety standards for the expected load.
• Connect the Cobreflex IIB to a compatible compression driver and amplifier chain. Use appropriate connectors and verify impedance compatibility to ensure efficient power transfer without distortion.
• Mount securely and align the horn to achieve the intended horizontal dispersion. Audio engineers should aim for uniform coverage across the target area while minimizing reflections from nearby surfaces.
• Test the system with speech and representative tones, then adjust equalization, crossover points, and gain to optimize intelligibility and loudness. Verify consistent coverage from multiple listening positions and document any necessary fine-tuning for future maintenance.

Frequently asked questions

• What is the Cobreflex IIB best used for? It is designed for public address, paging, and voice warning systems where clear speech intelligibility and controlled coverage are essential in medium to large spaces, including educational facilities, transit hubs, and industrial environments.
• How does the patented folded horn design improve performance? The folded horn path minimizes internal reflections and diffraction, improving phase coherence and reducing distortion. This leads to cleaner voice reproduction and more efficient energy transfer from the driver to the horn.
• What drivers work with the Cobreflex IIB? The design is optimized to pair with common compression drivers used in professional PA systems. Selecting a driver with appropriate sensitivity and power handling ensures optimal loudness and clarity for the intended space.
• Is the Cobreflex IIB suitable for outdoor use? The Cobreflex IIB is intended for professional environments and can be installed in covered or climate-controlled outdoor spaces when integrated into suitable weather-resistant enclosures and weather-friendly mounting hardware. Always follow manufacturer guidance for environmental conditions.
• Can I retrofit the Cobreflex IIB into an existing PA system? Yes, it can be integrated with compatible amplifiers and crossovers in many public address configurations. Ensure compatibility with the horn's impedance, mounting provisions, and the overall system gain structure to preserve clarity and coverage.
• How should I maintain the Cobreflex IIB? Regular inspection of mounting hardware, connectors, and protective grilles is recommended. Periodic acoustic checks and spark-ignition or moisture checks in humid environments help maintain consistent performance over time.